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[" The magnetic moment of a current carr...

[" The magnetic moment of a current carrying loop is "2.1times10^(-25)" amp "times m^(2)" .The magnetic field at "],[" a point on its axis at a distance of "1A" is: "],[[" (A) "4.2times10^(-2)" weber "/m^(2)," (B) "4.2times10^(-3)" weber "/m^(2)],[" (C) "4.2times10^(-4)" weber "/m^(2)," (D) "4.2times10^(-5)" weber "/m^(2)]]

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